"30" by 30" by 10" containment cage" > metric measurements only for scientists, please. Also, why the exact measurements? Will something awful happen if the cage is a little smaller or a little bigger? No? Then there's no need to specify unless you want to give a lower bound for humane and containment-savvy reasons.

"in Dr. West's office" > this is an unsecure area, and Dr. West could be fired for negligence.

"SCP-XXXX looks and acts like a standard domesticated gerbil." > but what is it? Is it not a gerbil? This sentence makes me suspect it is not actually a gerbil. Also, there are different kinds of gerbils. Give us a species? https://en.wikipedia.org/wiki/Gerbil

"Close proximity to any SCP" > In-universe, "SCP" refers to the containment procedures; SCP object to the actual thing in containment.

"a veterinarians office" > missing apostrophe

Please finish telling the reader about what the thing is and does before distracting them with information about where it was found.

"O-5 Council." > more commonly O5 council.

Overall reaction:

This is kind of boring, sorry. The test with 173 just makes this seem like the author wanted to write something cool to combat other famous SCP objects they didn't write, and the fact that its only effects are "effectively immortal" and "cancels out anomalies" make this seem overpowered to the point where there's not much of a story that can be told with it. The whole "it's so strong but still so useful and nice to the Foundation!" approach seems a little juvenile in its naive hopefulness. I'm not too sure how well that will go over with the audience we've got on the site.

I don't think there's much that can be done with this, sorry. If you really want to try to work with this, I recommend getting the base idea polished up in the Ideas and Brainstorming forum before you try fixing the draft. Go to that forum, post a quick summary of the concept you want to write up (don't link the draft unless someone asks), and reviewers there can help you make the idea more interesting and give you some advice on structuring the eventual article for smoothness of reading and narrative.